ラベル要素とインプット要素を使用してコンテンツ領域を開閉するアコーディオン機能を実装します。

ご自由にご利用ください。

Previews

Examples html

<!-- accordion -->

<div class="accordion">

	<article>
		<input type="checkbox" id="check1" name="accordion" class="check" />
		<label for="check1" class="label1">Section 1</label>
		<section class="content1">
			<div class="description">Implement accordion functionality. Accordions are useful when you want to toggle between hiding and showing large amount of content.</div>
		</section>
	</article>

	<article>
		<input type="checkbox" id="check2" name="accordion" class="check" />
		<label for="check2" class="label2">Section 2</label>
		<section class="content2">
			<div class="description">Implement accordion functionality. Accordions are useful when you want to toggle between hiding and showing large amount of content.</div>
		</section>
	</article>

	<article>
		<input type="checkbox" id="check3" name="accordion" class="check" />
		<label for="check3" class="label3">Section 3</label>
		<section class="content3">
			<div class="description">Implement accordion functionality. Accordions are useful when you want to toggle between hiding and showing large amount of content.</div>
		</section>
	</article>

</div>

<!-- /accordion -->

Examples css

/* - accordion - */

.accordion {
	width: 100%;
	height: auto;
	margin: 0px 0px 0px 0px;
	padding: 0px 0px 0px 0px;
	background-color: rgba(0, 0, 0, 0.0);
}

article {
	width: 100%;
	height: auto;
	margin: 0px 0px 0px 0px;
	padding: 0px 0px 0px 0px;
	background-color: rgba(0, 0, 0, 0.0);
}

input[type="checkbox"].check {
	display: none;
}

label.label1,
label.label2,
label.label3 {
	width: 100%;
	min-height: 50px;
	margin: 0px 0px 0px 0px;
	padding: 10px 10px 10px 10px;
	background-color: rgba(0, 0, 0, 0.0);
	display: -webkit-flex;
	display: flex;
	-webkit-flex-direction: row;
	flex-direction: row;
	-webkit-flex-wrap: wrap;
	flex-wrap: wrap;
	-webkit-justify-content: space-between;
	justify-content: space-between;
	-webkit-align-content: center;
	align-content: center;
	-webkit-align-items: center;
	align-items: center;
	cursor: pointer;
}

label.label1 {
	border: 1px solid rgba(0, 0, 0, 1.0);
}

label.label2 {
	margin: -1px 0px 0px 0px;
	border: 1px solid rgba(0, 0, 0, 1.0);
}

label.label3 {
	margin: -1px 0px 0px 0px;
	border: 1px solid rgba(0, 0, 0, 1.0);
}

label.label1,
label.label2,
label.label3 {
	font-family: sans-serif;
	font-size: 1.4rem;
	font-style: normal;
	font-weight: 200;
	text-decoration: none;
	color: rgba(0, 0, 0, 1.0);
}

label.label1::after,
label.label2::after,
label.label3::after {
	content: "＋";
}

label.label1::after,
label.label2::after,
label.label3::after {
	font-family: sans-serif;
	font-size: 1.4rem;
	font-style: normal;
	font-weight: 200;
	text-decoration: none;
	color: rgba(0, 0, 0, 1.0);
}

input[type="checkbox"].check:checked + label.label1::after,
input[type="checkbox"].check:checked + label.label2::after,
input[type="checkbox"].check:checked + label.label3::after {
	content: "－";
}

input[type="checkbox"].check:checked + label.label1::after,
input[type="checkbox"].check:checked + label.label2::after,
input[type="checkbox"].check:checked + label.label3::after {
	font-family: sans-serif;
	font-size: 1.4rem;
	font-style: normal;
	font-weight: 200;
	text-decoration: none;
	color: rgba(0, 0, 0, 1.0);
}

input[type="checkbox"].check:checked + label.label1 + section.content1,
input[type="checkbox"].check:checked + label.label2 + section.content2,
input[type="checkbox"].check:checked + label.label3 + section.content3 {
	width: 100%;
	height: 100px;
	margin: 0px 0px 0px 0px;
	padding: 0px 0px 0px 0px;
	background-color: rgba(0, 0, 0, 0.0);
}

input[type="checkbox"].check:checked + label.label3 + section.content3 {
	margin: -1px 0px 0px 0px;
}

section.content1,
section.content2,
section.content3 {
	overflow: hidden;
	width: 100%;
	height: 0px;
	margin: 0px 0px 0px 0px;
	padding: 0px 0px 0px 0px;
	background-color: rgba(0, 0, 0, 0.0);
	transition: height .3s;
}

section.content1 {
	border-right: 1px solid rgba(0, 0, 0, 1.0);
	border-left: 1px solid rgba(0, 0, 0, 1.0);
}

section.content2 {
	border-right: 1px solid rgba(0, 0, 0, 1.0);
	border-left: 1px solid rgba(0, 0, 0, 1.0);
}

section.content3 {
	margin: -1px 0px 0px 0px;
	border-right: 1px solid rgba(0, 0, 0, 1.0);
	border-bottom: 1px solid rgba(0, 0, 0, 1.0);
	border-left: 1px solid rgba(0, 0, 0, 1.0);
}

.description,
.description,
.description {
	width: 100%;
	height: auto;
	margin: 0px 0px 0px 0px;
	padding: 10px 10px 10px 10px;
	background-color: rgba(0, 0, 0, 0.0);
}

.description,
.description,
.description {
	font-family: sans-serif;
	font-size: 1.4rem;
	font-style: normal;
	font-weight: 200;
	text-decoration: none;
	color: rgba(0, 0, 0, 1.0);
}

/* - /accordion - */